﻿<p>An <em>IfcDocumentInformationRelationship</em> is a relationship entity that enables a document to have the ability to reference other documents. It is used to describe relationships in which one document may reference one or more other sub documents or where a document is used as a replacement for another document (but where both the original and the replacing document need to be retained).</p>

<blockquote class="history">
HISTORY&nbsp; New entity in IFC2x.
</blockquote>
<blockquote class="change-ifc2x4">
IFC4 CHANGE&nbsp; Subtyped from <em>IfcResourceLevelRelationship</em>, order of attributes changed.
</blockquote>